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CVE-2025-38686

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CVE-2025-38686

Published: Sep 4, 2025

Modified: May 11, 2026

PUBLISHED

Description

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: fix a crash in UFFDIO_MOVE when PMD is a migration entry When UFFDIO_MOVE encounters a migration PMD entry, it proceeds with obtaining a folio and accessing it even though the entry is swp_entry_t. Add the missing check and let split_huge_pmd() handle migration entries. While at it also remove unnecessary folio check. [[email protected]: remove extra folio check, per David]

VendorProductVersions

Linux

Linux

affected
adef440691bab824e39c1b17382322d195e1fab0 - < bb81c18dbd42650c844e160cafa7cbb20243a96a
affected
adef440691bab824e39c1b17382322d195e1fab0 - < 1202abad7a7ccd28c426d2844771a387b07629a4
affected
adef440691bab824e39c1b17382322d195e1fab0 - < 7f1101a0a181243ad587ececdffc4845f035549f
affected
adef440691bab824e39c1b17382322d195e1fab0 - < aba6faec0103ed8f169be8dce2ead41fcb689446

Linux

Linux

affected
6.8
unaffected
0 - < 6.8
unaffected
6.12.43 - <= 6.12.*
unaffected
6.15.11 - <= 6.15.*
unaffected
6.16.2 - <= 6.16.*

+1 more versions

References

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